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RE: John Gilmore and the Great Internet Snake Drive



John,
Do you plan on renting out the use of the cracker on a per-key basis and if
so, how much do you anticipate charging for cracking a message?

Thanks,
--Lucky

> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On Behalf Of John Gilmore
> Sent: Wednesday, July 22, 1998 6:19 AM
> To: John Lowry
> Cc: Robert Hettinga; [email protected]; [email protected];
> [email protected]; [email protected]; [email protected];
> [email protected]; [email protected]
> Subject: Re: John Gilmore and the Great Internet Snake Drive
>
>
> > One lesson I plan to observe - don't encrypt known plaintext unless you
> > have to !
>
> The EFF DES Cracker cracks more than just known plaintext (though it's
> the easy case).  It also cracks plaintexts whose likely byte values
> are known (e.g. all alphanumeric), winnowing the keyspace down to a
> size that software or humans can search.  Such a search runs in very
> close to the time required for an ordinary known-plaintext search.
> See the book for details (www.oreilly.com).
>
> We successfully cracked a DES-encrypted Eudora saved-mail file
> provided by Bruce Schneier during our debugging period.  He gave us
> the top byte of the key so we could focus on debugging rather than on
> waiting to get to the right block of keyspace.  The machine located
> the key within that 49-bit keyspace after we fixed a few software
> bugs.
>
> 	John
>
>
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